Gurobi 5.0.1 (linux64) logging started Mon Feb 4 18:52:37 2013 Optimize a model with 12383 rows, 1764 columns and 37926 nonzeros Presolve removed 2063 rows and 917 columns Presolve time: 0.07s Presolved: 10320 rows, 847 columns, 31623 nonzeros Variable types: 17 continuous, 830 integer (830 binary) Found heuristic solution: objective 38261.000000 Root relaxation: objective 3.025061e+04, 3301 iterations, 0.12 seconds Nodes | Current Node | Objective Bounds | Work Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time 0 0 30250.6111 0 6 38261.0000 30250.6111 20.9% - 0s H 0 0 30260.000000 30250.6111 0.03% - 0s 0 0 30251.3519 0 14 30260.0000 30251.3519 0.03% - 0s 0 0 30251.3519 0 5 30260.0000 30251.3519 0.03% - 0s 0 0 30251.4629 0 17 30260.0000 30251.4629 0.03% - 0s 0 0 30252.0004 0 20 30260.0000 30252.0004 0.03% - 0s 0 0 30252.5702 0 19 30260.0000 30252.5702 0.02% - 0s 0 0 30252.7843 0 19 30260.0000 30252.7843 0.02% - 0s 0 0 30252.9261 0 22 30260.0000 30252.9261 0.02% - 0s 0 0 30253.0975 0 21 30260.0000 30253.0975 0.02% - 0s 0 0 30253.2688 0 21 30260.0000 30253.2688 0.02% - 0s 0 0 30253.2987 0 23 30260.0000 30253.2987 0.02% - 0s 0 0 30253.3029 0 23 30260.0000 30253.3029 0.02% - 0s 0 0 30253.3029 0 23 30260.0000 30253.3029 0.02% - 0s H 0 0 30258.000000 30253.3029 0.02% - 0s 0 2 30253.3986 0 23 30258.0000 30253.3986 0.02% - 0s Cutting planes: Gomory: 1 MIR: 24 Zero half: 2 Mod-K: 1 Explored 59 nodes (3923 simplex iterations) in 0.38 seconds Thread count was 1 (of 16 available processors) Optimal solution found (tolerance 1.00e-04) Best objective 3.025800000000e+04, best bound 3.025600000000e+04, gap 0.0066%